I tried investing quite a bit in YoloDice and it was a good investment with 20% return!
Of course I'm not expecting such awesome return on the long run, but investing in casinos is a good way to assure a steady income in my opinion, casino will always win on the long run ^^
I do not think that investment bankroll can give us a steady income. I can say that bankroll can give you some profit but not as steady income. The reason is that there is always times when some whales beat Casino bankroll. In that event, the casino investment will surely have negative ROI. I still incline to jobs as best way to steady income.